JPH0141494B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a heat insulating board for construction (hereinafter simply referred to as a heat insulating board) useful as an exterior material for buildings and structures. In particular, the present invention relates to an apparatus that can manufacture a heat insulating board that can be used as a fireproof structural member, has excellent productivity, and can also reduce costs.

Traditionally, the equipment for producing the above-mentioned heat insulating boards has been to mix refractories throughout the foamed structure of the synthetic resin foam that serves as the core material, layer a flat sheet-like material on top of it, and then use a curing oven, etc. It was common to have a structure in which the material was fed to a container, then cured and molded. However, the heat insulating board manufactured using the above apparatus had the following drawbacks. In other words, with conventional equipment, it is difficult to uniformly mix the foamable synthetic resin raw material and the refractory because the reaction rate, expansion rate, and viscosity increase rapidly, and the foamed structure becomes extremely rough. . When the foam structure of the heat insulating core material is damaged, the foaming ratio and mechanical strength decrease. , which increases the amount of foamable synthetic resin used, leading to an increase in costs. During foam molding, the foamable synthetic resin leaks from the side edge of the sheet material, staining the back surface of the insulation board and the mold material. In other words, when a flat sheet is formed into a foam, the foaming pressure of the foam is used to shape the sheet into a shape, so even a slight deviation will cause the above-mentioned results. In particular, in the case of a cross-sectional shape having a bulge protruding from the recess of the metal hoop material, the desired cross-sectional shape is very often not achieved because the side ends of the female part are molded and released at the same time. This is because the synthetic resin raw material in the process of foaming comes into direct contact with the mold material. That is, this is because a gap occurs between the current temperature of the mold material being heated and the temperature of the raw material that is being foamed.

In order to eliminate such drawbacks, the present invention makes it possible to form a fireproof layer in which fireproof aggregate is present at a high density only in the female connection structure, which is the weakest point in the fireproof structure, and in other parts. The synthetic resin foam layer has a single structure, and can be coated with the molded backing material, and the metal hoop material and sheet material are fixed together by the self-adhesive property when the foamable synthetic resin raw material foams, resulting in low cost. and the desired fire resistance,
The present invention proposes an apparatus for manufacturing a heat insulating board that has good heat insulating properties and mechanical strength, and does not cause resin to leak outside due to the foaming pressure during manufacturing, thereby causing no contamination of the heat insulating board or the equipment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat insulating board manufacturing apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of a heat insulating plate manufacturing apparatus according to the present invention. In the figure, reference numeral 1 denotes a surface material supply means that continuously feeds a flat plate or embossed metal hoop material (hereinafter simply referred to as hoop material), and includes, for example, an uncoiler and a pinch roller 2 on which the hoop material is attached. , for continuously feeding the hoop material A to the forming means 3 for the next process. The forming means 3 continuously forms the hoop material by, for example, roll forming, as shown in FIG. 2a. As is clear from the figure, the formed hoop material A has a concave cross section and has a male connecting portion B and a female connecting portion C at the open end of its side wall. Step 4 is to heat the roll-formed hoop material A to approximately 40 to 80°C using a heating means.
The hoop material is always kept at a set constant temperature when it is transferred to the next process.
This is because when a foamable synthetic resin raw material is discharged as described later, the contact area and the ambient temperature have a large influence on the chemical reaction system like a catalyst, and the fluidity and
This is to suppress changes in expansion ratio. 5 is a lower mold conveyor 6 which conveys the hoop material A formed by the curing means with the concave opening exposed, and a lower mold conveyor 6 which matches the lower mold conveyor 6 and is configured to close the opening H of the hoop material A with the back surface material D. It consists of an upper mold conveyor 7 that guides the molds. Specifically, the upper and lower conveyors are either a caterpillar type or a steel belt type, and each conveyor 6, 7 is constantly heated to about 40 to 90°C. 8 is a refractory supply means for supplying a fixed amount of refractory material to the inorganic porous particles, and as shown in FIG.
, a hose 10 , a switch 11 , a gate 12 , and a discharge tool 13 are connected in series, and on the back side of the female connecting part C of the hoop material A, inorganic porous particles (hereinafter referred to as It is a device that continuously supplies refractories (simply referred to as refractories), such as pearlite grains and shirasu balloons, in fixed quantities. In other words, the supply to the refractories is controlled by the ON-OFF switch 11,
The system is stopped and the amount of feed to the refractory is kept constant at the gate 12. If there is no gate 12 and the refractory is supplied directly to the discharge tool 13, the switch 11
This is because it is necessary to control the discharge amount during ON-OFF, and to finely adjust opening and closing until the amount passing through the so-called refractory becomes constant. The discharge tool 13 temporarily stores the refractory that has passed through the gate 12 for a short period of time, and supplies the refractory in a fixed amount to the rear surface from the slit 13a. That is, the discharge tool 1
3 is a hopper-shaped cross section as shown in Fig. 4;
A slit 13a having a length △l and a width △t is provided at the exit portion, and the refractory is metered from this slit 13a,
It is supplied to the back side of the female type connection part. Note that the distance △h between the back surface and the slit 13a is not directly related to the supply amount since the surface to be laminated is constantly moving, but it is approximately 5 to 50 mm to prevent scattering and to discharge to a predetermined position.
It is the rank. Reference numeral 14 denotes a core material supply means for discharging a foamable synthetic resin raw material, such as a means for discharging polyurethane resin, phenol resin, or resin for polyisocyanurate foam in a fan-shaped film thickness pattern. Reference numeral 15 denotes a backing material supply means for continuously supplying the backing material D, and numeral 16 denotes a forming guide means, which is composed of a guide roller 17 and a paper forming machine 18 that forms the backing material D into a rectangular shape. The backing material, such as kraft paper, asbestos paper, metal foil (Al, Cu, Fe), is used at the opening of
It is intended to be closed with one type or a laminate of two or more types. Reference numeral 19 denotes a means for cutting the heat insulating board into regular lengths, and is made of, for example, a flying cutter. Reference numeral 20 is a cover that maintains the curing means 5 at a predetermined temperature and prevents leakage of toxic gas and nonflammable gas into the working environment and danger to workers.

Next, the operation of the heat insulating board manufacturing apparatus according to the present invention will be briefly explained. Currently, the hoop material is 0.27mm.
A pre-coated metal plate was prepared, a kraft paper laminated with aluminum foil was prepared as the backing material, and a polyurethane resin was prepared as the foamable synthetic resin raw material. In addition, upper and lower conveyors 6 and 7 are 30m/min.
The mold is heated to a temperature of 60℃. Furthermore, heating means 4, such as a hot air type preheater, heats the hoop material at 40°C.
It is heated to Then, the starting end of the hoop material A is guided to the pinch rolls 2 and fed to the forming means 3. From the outlet of the forming means 3, the hoop material I formed into the shape shown in FIG. 2a is continuously fed to the next step. And in Figure 1, A-
The hoop material A that has passed through line A' is fed to the preheater 4, heated to approximately 40°C, and inserted into the lower mold conveyor 6 so that the concave opening is exposed, and placed directly under the refractory supply means 8. reach. Therefore, a fixed amount of refractory material (in this case, pearlite particles having an average particle size of 2 to 3 mmφ) is supplied to the back side of the female connecting portion E in the state shown in FIG. In addition, B to the supplied pearlite grains
When they pass through the position of line -B', they are in a stacked state as shown in FIG. 2b. Next, from the core material supplying means 14, a third
In the state shown in the figure, the foamable synthetic resin raw material is discharged, and as shown in FIG. In particular, the polyurethane resin is discharged so that a portion of the polyurethane resin also adheres to the vicinity of the laminated portion of the pearlite grains. This is to prevent pearlite grains from falling off to the concave side. When the hoop material A, in which the foamable synthetic resin raw material and the refractory material are laminated in this way, reaches the entrance of the curing means 5, that is, the position indicated by the line D-D' in FIG. 1, it is molded from the molding guide means 16. The backing material D is sequentially laminated on the back side of the hoop material A as shown in FIG. 2d. Next, the hoop material A and the back material D are gradually brought into alignment by the upper and lower die conveyors 6 and 7 of the curing means 5. On the other hand, when entering the curing means 5, the reaction and foaming speed of the foamable synthetic resin rapidly increases, and the space formed by the hoop material A and the backing material D is filled with the foam layer, and the space between the refractory material and the foam layer increases. Due to the foaming pressure, the foamable synthetic resin raw material t enters into the refractory, and the line E-E' in Fig. 1 shows the state shown in Fig. 2 e, filling the entire space and the gaps between the refractories, and then the curing process. As a result, it is sent out from the outlet as a heat insulating board material. This is cut into a regular length by a cutting means 19 to produce a product. As shown in Fig. 5, the heat insulating board manufactured in this way has a fireproof layer with a densely distributed refractory material formed on the back side of the female joint part, and a synthetic resin foam layer formed on the concave part. It had been.

What has been described above is only one embodiment of the heat insulating board manufacturing apparatus according to the present invention, and an embossing process may be incorporated during roll forming, or a gate-like function may be concentrated on the discharge tool 13.

As described above, the heat insulating board manufacturing apparatus according to the present invention has the feature of solving the above-mentioned drawbacks at once.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing an embodiment of the apparatus for producing thermal insulation board materials for buildings according to the present invention, Fig. 2 a to e are explanatory diagrams showing the steps in the above apparatus, and Fig. 3 shows inorganic porous particles and foamed particles. FIG. 4 is an explanatory diagram showing a dispensing tool for inorganic porous particles, and FIG. 5 is an explanatory diagram showing a heat insulating board material for construction manufactured by the above apparatus. . 1... Surface material supply means, 3... Molding means, 5...
... Cure means, 8... Refractory supply means.

Claims (1)

[Claims] 1. A surface material supplying means for continuously feeding a metal hoop material, a forming means for forming the metal hoop material into a concave cross section with male and female connecting parts arranged on the left and right sides of the lower end of the side wall, and the formed metal hoop material. A heating means for heating the material to a constant temperature, a lower mold conveyor that is fitted with the molded metal hoop material with its concave opening exposed, and an upper mold conveyor that is fitted so as to close the opening of the lower mold conveyor. a curing means, and a refractory supply means for supplying a fixed amount of inorganic porous particles to the back surface of the female connecting portion of the metal hoop material fed from the heating means;
Next to the means, a core material supplying means for discharging a core material made of a foamable synthetic resin raw material to an average thickness into the concave portion of the metal hoop material, and a backing material supplying means for feeding a backing material. a forming guide means for forming the back material into a cross-sectional shape at the entrance of the curing means and guiding and feeding it so as to cover the back surface of the metal hoop material; 1. An apparatus for manufacturing a heat insulating board for construction, comprising a cutting means for cutting the supplied heat insulating board for construction having a sandwich structure to a regular length.